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| author |   Achill Gilgenast <fossdd@pwned.life> | 2025-07-29 11:45:53 +0200 |
|---|---|---|
| committer |   Alexei Starovoitov <ast@kernel.org> | 2025-07-31 11:39:46 -0700 |
| commit | 13cb75730b7a8b2dc8fe32874e159b2c7b75efde (patch) | |
| tree | fb8452c13c4a15e6f9bc981e4b7d7ec4e1eb306f | |
| parent | bpf: Fix oob access in cgroup local storage (diff) | |
| download | wireguard-linux-13cb75730b7a8b2dc8fe32874e159b2c7b75efde.tar.xz wireguard-linux-13cb75730b7a8b2dc8fe32874e159b2c7b75efde.zip | |
libbpf: Avoid possible use of uninitialized mod_len
Though mod_len is only read when mod_name != NULL and both are initialized
together, gcc15 produces a warning with -Werror=maybe-uninitialized:
libbpf.c: In function 'find_kernel_btf_id.constprop':
libbpf.c:10100:33: error: 'mod_len' may be used uninitialized [-Werror=maybe-uninitialized]
10100 | if (mod_name && strncmp(mod->name, mod_name, mod_len) != 0)
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
libbpf.c:10070:21: note: 'mod_len' was declared here
10070 | int ret, i, mod_len;
| ^~~~~~~
Silence the false positive.
Signed-off-by: Achill Gilgenast <fossdd@pwned.life>
Acked-by: Yonghong Song <yonghong.song@linux.dev>
Acked-by: Eduard Zingerman <eddyz87@gmail.com>
Link: https://lore.kernel.org/r/20250729094611.2065713-1-fossdd@pwned.life
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
| -rw-r--r-- | tools/lib/bpf/libbpf.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/tools/lib/bpf/libbpf.c b/tools/lib/bpf/libbpf.c index e067cb5776bd..fb4d92c5c339 100644 --- a/tools/lib/bpf/libbpf.c +++ b/tools/lib/bpf/libbpf.c @@ -10096,7 +10096,7 @@ static int find_kernel_btf_id(struct bpf_object *obj, const char *attach_name, enum bpf_attach_type attach_type, int *btf_obj_fd, int *btf_type_id) { - int ret, i, mod_len; + int ret, i, mod_len = 0; const char *fn_name, *mod_name = NULL; fn_name = strchr(attach_name, ':'); |